JPH0255729B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a full water test plug for a drainage device used for leakage testing of drainage piping in buildings and the like.

Normally, after plumbing work is completed, drainage pipes are inspected to check for leaks caused by poor connections, etc.
A so-called full water test is conducted. This test is conducted by sealing all openings of the target drain pipe section, except for the highest part, and filling the drain pipe with water until the required test water pressure is reached. The opening to be sealed here is mainly the drain port of the drainage device attached to the end of the drain pipe.

The full water test plug for drainage equipment according to the present invention includes:
This is to block this drain port during the full water test.

(Prior art) Conventionally, this type of full water test plug (hereinafter simply referred to as "plug") for drainage equipment has been
There is one shown in the figure. This is the upper surface of the locking piece D that protrudes from the outer periphery of the base C of the plug, relative to the lower surface of the protruding ring B that protrudes from the inner periphery of the drain frame A of the target drain. and a tightening nut F screwed onto the top of the stand rod E, which is suspended from the base.
By spiraling downward, the presser cover G is pushed down, and the cross section interposed concentrically with the vertical lever E between the base C and the presser cover G is formed into a C-shaped shape that is easily deformed. The C-shaped packing J is compressed and deformed, and the tightening nut F is screwed on while maintaining watertightness between the C-shaped packing J.
is compressed and deformed, and the flat packing K attached to the lower surface of the peripheral edge of the retaining lid G is attached to the flange L of the drain frame A.
It was designed to maintain watertightness by being pressed against the top surface of the tank. The vertical lever E in this example has a through hole for venting air in the center thereof, and a closing nut M is screwed onto the upper end thereof.

In the conventional device described above, the distance from the upper surface of the flange L of the drain outlet frame to the lower surface of the protruding ring B is defined as H1, and the locking piece is measured from the lower surface of the flat packing K of the plug before tightening the tightening nut F. If the distance to the top surface of D is H2, these are approximately H1
It is intended to be used in a drain frame with a relationship of <H2, and when sealing, first the C-shaped packing J, which can be easily compressed and deformed, is compressed and deformed, and then the flat packing K is compressed onto the top surface of the flange L. It is becoming more and more common.

Therefore, when used for a drain frame where the dimensional relationship between H1 and H2 is, for example, H1>H2, the watertightness between the flat packing K and the flange L can be maintained. Since the amount of compressive deformation is small, the C-shaped packing J cannot actually undergo the compressive deformation necessary to maintain watertightness, and passes through the gap between the protruding ring B and the locking piece D. Since water leaks from between the presser foot lid G and the stand lever E, making it impossible to perform a full water test, the above-mentioned relationship H1 < H2 must be ensured by replacing the flat packing with a thinner one each time. In practical terms, it was extremely inconvenient.

(Problems to be Solved by the Invention) The present invention solves the above-mentioned H1
This was devised with the aim of rationally solving the problem that its use becomes practically difficult depending on the dimensional relationship between H2 and H2.

(Means for Solving the Problems) A means for solving the above-mentioned problems in the conventional full water test plug for drainage equipment is to provide a base that can be releasably engaged with the drain outlet frame of the drainage equipment. , an upright rod with a screw on the outer periphery of the upper part is vertically installed on the base, and above the base, the upper surface of the opening of the drain outlet frame is covered, and the lever is attached to the periphery of the upper surface of the drain outlet frame. A presser lid, which is provided with a packing on the lower surface of the peripheral edge that can be stopped, is fitted to the upright rod through an insertion hole provided therethrough so as to be able to move up and down, so that the inner peripheral surface of the upper edge of the insertion hole and the inner circumferential surface of the upper edge of the upright rod are connected to each other. A packing is interposed between the outer circumferential surface and a collar is interposed above the packing, and a tightening nut is screwed onto the upright rod above the collar to connect the presser lid and the upright rod. The presser cover is pressed downward at the same time as maintaining watertightness.

(Function) The plug according to the present invention has the above-described configuration,
When the base is locked in the drain frame and the tightening nut is rotated and screwed in the direction of pushing down the retaining lid, the retaining lid is automatically moved through the collar and the packing interposed below. When pressed down, the packing on the lower surface of the periphery of the presser lid comes into contact with the periphery of the upper surface of the drain outlet frame, but by further threading the tightening nut, both packings are simultaneously compressed, and their respective parts are compressed. watertightness is ensured.

That is, in the plug according to the present invention, regardless of the distance from the upper surface of the drain outlet frame to the lower surface of the protruding ring on the inner periphery thereof, it is possible to effectively close the drain outlet and make it watertight.

(Example) An example of the plug according to the present invention will be described based on FIGS. 1 and 2.

In the figure, A is the drain port frame of the drain device, which is the opening of the drain pipe in the area subject to the full water test, and the main body is formed in a cylindrical shape, and the upper end of the main body is provided with a horizontal flange L. Further, a projecting ring B for hooking locking pieces 2 to 2 of the base 1, which will be described later, is provided protrudingly along the inner circumferential surface of the projecting ring. (The case of four is shown.) Notches S are provided at approximately equal angular intervals.

Describing the plug of the present invention in detail below, reference numeral 1 denotes the base of the plug, which is a disc having an outer diameter slightly smaller than the inner diameter of the protrusion ring B of the drain port frame A, and has a protrusion on its outer periphery. Locking pieces 2 to 2 having a size that can be inserted into the notch S of the ring B are provided in a protruding manner at the same position as the notch S.

Reference numeral 3 denotes a stand rod, the upper end of which is provided with a male thread 4 over the required length, and the lower end thereof is
Attach the head 5 and the snap spring 6 to the center of the base 1.
It is fixed to the base 1 via the base plate 1 and vertically installed on the base 1.
Incidentally, a vent hole 7 for venting air is passed through the axis of the upright rod 3 in that direction, and a closing nut 8 is attached to the opening at the upper end of the upright rod for freely opening and closing this portion.

Now, above the base 1, a stepped disc-shaped presser cover 9, which will be described in detail below, is fitted concentrically to the upright rod 3 so as to be movable up and down.
That is, the presser cover 9 has an insertion hole 10 extending through its center, and an O-ring on the inner peripheral surface of the upper edge of the insertion hole 10 for maintaining watertightness with the outer peripheral surface of the vertical rod 3. It is provided with a packing receiving surface 11 for receiving a shaped O-ring packing, and also covers the top surface of the opening of the drain port frame A and locks onto the top surface of the flange L of the drain port frame A. A flat packing 12 in the form of a flat ring is fitted onto the lower surface of its peripheral edge. In addition, 13
is a projecting piece integrally provided on the lower surface of the presser cover 9 in order to fit the flat packing 12 thereinto.

Next, as mentioned above, 14 is an O-ring packing for maintaining watertightness between the outer peripheral surface of the stand rod 3 and the insertion hole 10 of the presser cover 9, and is fitted into the packing receiving surface 11. Moreover, above the O-ring packing 14, a collar 15 is interposed, which is concentric with the upright rod 3 and has a cylindrical shape and has a packing pressing surface on the inner peripheral surface of the lower end.

Further, the upright rod 3 above the collar 15
A tightening nut 16 with a handle is screwed onto the male thread 4 at the upper end.

Next, the case where the plug according to the present invention is used in a full water test will be explained.

First, fit the base 1 into the main body of the drain frame A, and attach the locking pieces 2 to 2 of the base 1 to the drain frame A.
Position the base 1 in the notches S to S of the protrusion B
After lowering the base plate 1, the locking piece 2 of the base plate 1 is locked to the lower surface of the protruding ring B by slightly rotating the base plate 1.

Next, the tightening nut 16 is rotated and screwed through its handle in a direction to push down the presser cover 9. Then, the presser cover 9 will be attached to the collar 15 and O.
It is automatically pushed down via the ring packing 14, and the flat packing 12 on the lower surface of the presser cover 9 comes into contact with the flange L of the drain port frame A. At this stage, O-ring packing 14 and flat packing 1
2 begin to be compressed at the same time, but when the tightening nut 16 is further screwed on, both packings are simultaneously compressed and the watertightness of each part is ensured at the same time.

That is, in the plug according to the present invention, as long as the vertical rod 3 is of the desired length, the distance from the upper surface of the flange L of the drain frame A to the lower surface of the protruding ring B is irrelevant. , can also be used for various drain frames.

Then, while removing the closing nut 8 and venting air, water is supplied into the drain pipe until the required test water pressure is reached, and the closing nut is attached to fill the drain with water, and a full water test is performed as in the conventional method.

In this embodiment, an air vent is provided in the stand rod, but for air venting, it goes without saying that a small hole may be provided in the presser cover and a small valve may be attached. You can also do it.

Further, although the base is circular in shape, the present invention is not limited to this, and the inside can be made into a lattice shape to reduce weight.Furthermore, the base can be attached with vertical rods. This method is not limited to that of this embodiment, but may also be achieved by a technique of joining, for example, by welding or the like.

(Effects) In the full water test plug for drain equipment according to the present invention, by locking the base within the drain port frame and rotating and screwing the tightening nut in the direction of pushing down the holding lid, The packing attached to the retainer lid and the packing provided between the retainer lid and the stand rod are compressed at the same time to keep each part watertight. It can be used regardless of the distance to the bottom surface of the protruding ring on the inner circumference, so as long as the length of the stand rod is sufficient, it can be used as is for various drain frames regardless of the distance. The practical effects are extremely large.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway front view showing an embodiment of the present invention, FIG. 2 is a partially cutaway plan view thereof, and FIG. 3 is a central vertical sectional view showing a conventional example. 1...Base, 3...Stander, 4...Male screw, 9
... Presser cover, 10 ... Insertion hole, 12 ... Flat packing, 14 ... O-ring packing, 15 ... Collar, 16 ... Tightening nut.

Claims (1)

[Claims] 1. A base that can be releasably engaged with the drain frame of a drainage device is provided, and a stand rod with a thread on the upper outer periphery is vertically disposed on the base, and above the base, the drain A presser cover, which covers the upper surface of the opening of the spout frame and is provided with a packing on the lower surface of the peripheral edge that can be locked to the peripheral edge of the upper surface of the drain outlet frame, is attached to the upright rod through the insertion hole provided therethrough. Fitted in a movable manner, and a packing is interposed between the inner circumferential surface of the upper edge of the insertion hole and the outer circumferential surface of the vertical rod;
A collar is interposed above the packing, and a tightening nut is screwed onto the stand rod above the collar to maintain watertightness between the presser cover and the stand rod, and at the same time, the presser cover is moved downward. A water-filled test plug for drainage equipment characterized by being pressed.